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CVE

CVE-2021-34448

Microsoft Windows Scripting Engine Memory Corruption Vulnerability

Scripting Engine Memory Corruption Vulnerability.

MEDIUM · CVSS 6.8 ⚠ CISA KEV EPSS 0.02032
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • SSVC automatable: yes - attacks can be scripted at scale
Sigma rules0 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

⬡

Weakness Classification

CWE-787Out-of-bounds Write
CWE-787Out-of-bounds Write
▤

Affected Products & Versions

14
microsoft windows 10 1507< 10.0.10240.19003
microsoft windows 10 1607< 10.0.14393.4530
microsoft windows 10 1809< 10.0.17763.2061
microsoft windows 10 1909< 10.0.18363.1679
microsoft windows 10 2004< 10.0.19041.1110
microsoft windows 10 20h2< 10.0.19042.1110
microsoft windows 10 21h1< 10.0.19043.1110
microsoft windows 7all versions
▣

Scoring & Timeline

6.8
MEDIUM · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 Jul 2021 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

2
cisaKEV-CVE-2021-34448
msrcCVE-2021-34448Remote Code Execution
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34448PatchVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-34448US Government Resource
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